Door opening and closing mechanism.



F. SCOTT.

DOOR OPENING AND CLOSING MECHANISM. APPLICATION FILED APB.29,1908.

25, Patented June 22, 1909.

4 SHEETS-SHEET 1.

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Patented June 22, 1909.

4 SHEETS-SHEET 2.

\ \FHW F.SCOTT.

DOOR OPENING AND CLOSING MECHANISM.

APPLICATION FILED APB-.29, 1908.

19i t n no mfi W G Horne, 1g

F. SCOTT.

noon OPENING AND CLOSING MECHANISM.

APPLICATION FILED AYE. 29, 1908.

Patented June 22, 1909.

4 SHEETS-SHEET 3.

Flt wanker,

W6 tn ease:

F. SCOT-T.

DOOR OPENING AND CLOSING MECHANISM.

APPLICATION FILED APR.29,100B.

Patented June 22, 1909.-

4 SHEETS-SHEET 4.

nnrrnn stares 'ge rrnirjr PFICE.

FRANK SCOTT, OF ORBISQXIA, PiGNNSYLVANlA. AHRIGXOH Ol" ONE-HALF TO JAMES SHIVl'IhY, Oi" SllllllilhSBUltG, PENNSYLVANIA.

DOOR OPENING AND CLOSING MECHANISM.

Specification of Letters Patent.

Patented June 22, 1909.

Application filed. April 29,1908. Serial N 0.42.9,92 i.

zen of the United States, residing at. Orbisonia, in the county of lluntingdon and w btate 0t Pennsylvai'na. have invented new and usefulImprovements in Door Opening" and Closing Mechanism. of which the'fol lowing a specification.

This invention relates to autonniticallyactuated doors of that type which are thrown open by suitable mechanism which is set: into operation by the depressing of a platform, as by a person stq-iping upon the same and-which is reversed to close the door when the person steps off the platform, the

'door'being especially useful in hotel, store,

and other large buildings where persons are constantly passing-in and out.

The invention has for one ot its objects to improve and simplify the construction and operation'of apparatus of this charact'erso as to be comparatively simple and. inexpensive to manufacture, thoroughly liable and efiicient: in use, and of substantial design.

The invention consists of a door-operatingmechanism designed for use in. connection with a single or double door and int-hiding electricallv actuated means, in connection. with suitable. mechanical means whercl y the door will be thrown openas a person approaches and passes through the doorway and thrown closed after the person leaves the doorway.

The invention comprises an electric motor for operating the door-opening and closing; element, which latter-is driven forwardly or reversely by the motor through a clutch device that is controlled L a platform extending from opposite sides of the doorway sothat. as the platt'ornz is dcliressed. the clutch device will cause the said element to open the door and again close the door a the platt'orn'i returns to normal position. th circuit of the motor being controlled by the movement of the platform.

The invention further comprises arranged switches in the motor circuit some of which are closed by the depressing of the platform.

while the others are closed automatically .im-

lnediately after the door starts to open, so that the motor circuit will he maintained until the door has completed its movem nt without the opening of theswitches associated with the platform afl'ecting the motor controlling the latter.

circuit. thus preventing the door from ever stopping in an intermediate position.

Wit h these objects in view and others, as will appear as the description proceeds, the invention comprises the various novel features of construction and arrangement of parts which will he more fully described hereinafter and set; forth-with particularity in theclaims appended hereto.

in the acconrpanying' drawings, which illustrate one ot" the embodiments of the invention, l ig'ure l is a vertical sectional view of the apparatus showing the doors in closed position. l ig'. 2 is a horizontal sectional view of the door showing the operating platform in plan view. Fig. 3 is a dctail view oi a portion'oit the door showing one of the door switches and the member for Fig. 4 is a sectional view on line l --l. Fig. 1. Fig. 5 is a detail sectional view slmwing the stop device for limiting the movement of the members on thedoors for controlling the switches there on. Fig. 6 is a plan view of a modified form of platform and clutch actuating mcch anism. Figs. 7 and 8 are sectional views on lines 7---T and S-8. Fig. ti, respectively. Fig, 9 a diagramnnitic view of the circuit ct'mnections. 7

Similar reference characters are employed to'dcsignatc corresponding parts throughout the several views.

in the presentinstance, I have elected to illustrate the invention as applied to :1V double door, the section A ot-which is slidably mounted to more in and out of a pocket 1 in the all .2 at one side of the doorway, while the section 1 is composed of two parts and l connetztedtogether by hinges Sand hinge lly-att5clwd to the door frame. by hinges-6 so as to open and close by a folding movement. l t to be understood, howcver that the invention can be carried out in connection with a single. door either of the sliding or itoldahle type. 'l-he doorway has horizontally-extending grooves 7 into which project pins rising. from the tops oi the door sections so as to steady the doors during the opening and closing movements. Arranged in the doors are vertical sleeves 9 at the inner lower corner of each section and in these sleeves are slidably mounted bolts 10 that carry at their lower; ends rollers 11 and at.- tached to the bolts are tinge-r pieces 12 which extend through vertical slots 13 in the element continues to rotate for any rea To direct the bolts into the grooves 16 son. from the grooves- 17, spring guards '18 are arrangedat the ends of the grooves 16 and normally extend across the grooves 17, the said guards being arranged to yield to one side when the rollers 11 strike against the same from the rear in case the rotary ele- .ment should continue to rotate through one or more revolutions. H

j The rotary element 15 for opening and closing the door is driven by an electric motor M that has its shaft 19 provided-with a miter gear 20 that is constantly in mesh With miter gears 21 and 22 disposed on the shaft 23 of the element 15 so as to drive the latter in both directions. The hubs 24; of the Sliding clutch elenient 25 is thrown into! e11'- miter gears 21 and 22 are formedintotoothed clutch elements with which cooperates a sliding clutch element 25 that is feathered on the shaft 23 so that the said shaft can be driven by either miter gear 2 lgor'22. The

J gagement with either'miter gear bya lever 26 secured to a rock shaft 27. 'lh isfii ock shaft is connected by. links 28 that are in turn connected with bell crank levers 29 that are actuated by a platform G arranged in the floor at opposite sides of the door. In the present instance, the platform is composedof two sections 30 and 31 that are attached'a't their outer corners to the fioorby hinges32. with their meeting ends coinciding withthe door, and depending from the platformse'ctions are arms 33 to which the bell crank levers 29 are connected. Disposed under the platform sections are springs 34 that 3 hold the said sections flush with-the floor and permit the platform to yield or depress when a persoir steps upon either section so asto throw in the clutcn to connect the rotary.

element with the motor for opening the door. A person approaching the door from either side steps upon one platform sectionor the other and thereby automatically sets the door-opening mechanism into operation. 'When he passes from one platform section to, the other, the latter will still hold the clutch in engagement-with the forwardly driven .miter gear. 21, andwhenthe pressure is removed by theper'sonleaving the platform after having passed throughthe-door way,'the clutch will be autcrnaticallythrown.

intoengagement With .-the reverse gear Wheel 22 by the. gsp'rig gs underetire platform switches a, a a a that-are of any suitable "of the switches1b,"b b 5 and ceases storing the latter, and thuscause the door to be closed by the reverse rotation of the ele-" ment1'5. d

Inthe motor circuit are arranged starting design such as'is lmown in the trade as' the Perkins or Diamond H door push switch that are located under the platform sections, so that the depression of either of the latter will close the motor circuit for 7 starting the latter, i't-b'eing preferable to employ two switchesfor each platform section to insure the closing of the circuit. As soon as the door starts to open, additional switches are. automatically closed so as to so maintainthe continuity of the motor circuit and thus prevent the .motor from being out out prematurely and leaving the door in open position, as would be tliecase as soon as the person stepped off the platform, since by so doing, the platform switches would immediately open. For this purpose, the

circuit-maintaining switchesb, b b 5 are inount'ed on the door sections in such a nianner that when the door iscompletely closed, these switches will be open and when theT door starts to open, theywill immediately close and thus preserve the continuity of the motor circuit. These circuit maintaining switches are preferably ofthesame conmeeting'edges, as clearly shown in ,;Figs 1''" Led 4, and on each door section is afcircuit. controlling membeflsuch as airstrip-35 "con- 1 00 nested to-its respective section by; hinges. f '36 so as to swing outwardly when the 'iioor sectionsopen, there being springs 37, Fig. 3," wliich urge-the said strips outwardly; These switches open when the strips'are'pl I inwardly and heldin tlreirnormal position by the' door sectionswhen-iniclosegl position During the initialpart oflf the merit of thedoor, the nieinb Wardly, as shown Fig. the naintainingswitches' circuit, so that the con 7 the-motorwill be'inainta ed un Mae-door, is again closed;- The out "r enr'ije'r it or the members 35islimi BS- for h em er; as fi wme gagesin'a slot 40 ofsu' 11 me be against the metal plate hen l member is fully opene' prevent wear-f of the said memberswher the butt-011935 'proj ectj, metal" plates "42 are provided. door sections are provided with 'groov channels for receiving the conductorslead} is provided withh' take-up device such as a 130 i struction as those used under the platform and are set-into the door sections attheir the door section it moves inwardly and outwardly, the weight will take up the sag.

'.lhe cord conductor 4-8 for the switches inthe door section 13 is sutiicienily loose. as at 4.9, where the parts of the door section hinge so that the folding and unfolding of the door can be accomplished without strain on the conductor.

Referring to Fig. 6, S designates the main switch for connecting the motor circuit with the lead wires wot a suitable supply circuit, there being a protective device such as fusesfor preventing an overcharge of the motor circuit. The platform-actuated switches auare connected in parallel with the wires 0, c, which lead to the switch S, and including in the wire c is an auto matic switch S consisting of a solenoids through which current passes when either:

pair of switches (1, a (1 a. are closed.

Upontheenergizing of the solenoid, the motor M is connected in circu t so as to drive the door-opcning and closing device. .As the door begins to open,- all the circuit-maintainclosed so that current will pass through a shunt circuit consisting of the wires-(Z, (Z

connected respectively with the wires 0, c,

the said circuitanaintaining switches being com'tected in series with the widesil, at. As long as the switches 7)-b" are closed, the motor will be driven in one direction or the other, according to which gear 21 or is in niesh, so that the door will be moved to its extreme position, regardless of the condition of the switchesthat.

The operation of the apparatus will be briefly described as follows. hen a person approaches the door-wa t and treads upon other platform section, the latter is depresset'l and causes the motor circuit to be completed by the starting switches under the platform section that is depressed and at the same time the mechanical connection between such platform section and-the clutch will connect. the dooractuating element 15 with the motor. Assuming that the element 15 is rotated in a direction indicated by'the arrow, the rollers 11 are brought into contact with guards 18 in the inner annular grooves 16, thus causing the door sections to move apart.

I As the door sections move aparh'the members 235 spring outwardly to permit the circnit-maintaining switches on tl'IB dOOIS to be connected in circuit with the motor. The continued rotation of the elc ment 15 completely opens the door, and should the platform be held depressed for a longer period than is necessary to open the doors, the element 15 will continue to rotate,-

while the rollersll are in the outer annular switches, and as soon as the person steps oil the platform, the maintaining switches alone complete the circuit. lVhen the 'door sections have come together, the members 33 contact: and "are pressed inwardly so as to open the switches o l) and thus cut the motor out of circuit. 4

lteferriu to v the modified corstructiou shown in trips. 6 to 8. inclusive, D designatesthe platform which is made in one piece and cXtends from opposite sides of the door and is provided with a central slot 50 in which move the bolts 51 on the door sections. At the corners of the floor opening 52 in which the. platform is disposed are fixed guides 53 having vertical slots 5% into which project horizontal pins secured to the corners of the platform and disposed under the latter. These guides limit the downward movement of the platform and also insure against. lat eral displacement of the latter. Extending transversely to and disposed under the platform are li'mgitudinally movable rods- 56 slidahly mounted at their ends in bearings 57, and on each rod are cones or wedges 58 with which engage pointed lugs 59 secured to the under side of the platform. so that when either end of the platform depress-cal. the rod 56 imn'iediately under the depressed end' will be shifted longitruilinally for the purpose of actuating the clutch device. Therod 56 is restored to normal position by a spring 60- pressing on one of the bearings ST and one of the space collars G1. I Arranged under the middle of the platform and directly in line with the slot 30 thereof is the door-o 'iei'iin'g and closing ele ment (32 substantiall} similar to the element l5.referred to in connection with Fig. 1, and equipped with a clutch device whereby the element, 62 can be driven in forward or reverse direction by a 1tni-directioi'ial motor. The movable member 525 of the clutch device is connected with oppositely-disposed levers 63 mounted on fulcrums 64: and the outer ends of the levers engage between the collars 61 on the rods 56 at the ends of the platform. The springs 60 restore the lovers to normal position and also restore the platform when a person steps off the same.

When a person steps on the platform, the approach end thereof is depressed whereupon the rod 56 is moved laterally so as to throw in the clutch and permit the motor'to rotate the element- 2 in a direction to open the door sections, and as long as a. person is on the platform the motor will continue to operate and upon leaving'the platform the partswill be restored to'normal position and the clutch reversed so aslto causethe element 62 to return the door sections to closed posi-- tion; the foregoing description, taken in neotion with the accompanyino' drawthe advantages of-the construct-ion and 0 th nzthod 'oii-operat-ionwil'l be readily a parentto. those skilled in the art' towhich t 'inyelition appertains,' and while I have (1 cribed the principle of operation of the ention, together with Y the apparatus which I now consider to be the best embodient' thereof, I desire to have it understood iliatthe apparatus shown is merely illustrative, and that such changes may be made yvhen desired as-are within the scope of the felaims appended hereto.

Having thus described the invention, what [claim is: i

The combination. of a'door, a mechanism for opening and closing the same including an e ectri'c m0'tor,'a platform, switches fnrhlosing the circuit of the motor by the def) ession of the platform, a switch. set into th door and connected in circuit with the otorga memher on the door-concealing the switch .a'ndja rranged to hold the latter open .w heri the' door isclosed, and means disposed between the door and member for moving the latt'ei'f-when the door is open to permit the; switch of the door to close to holdthe motor circuit closed independently of. the itch controlled by the platform; i The combination. of a door,.a; member nge'dly connected with the door adjacent Y enet edge thereof, springs interposedbetween the door and member for urging the latter outwardly, means'for limitii'ig the outwardniovement of the .mcmber, a switch mounted on the door and held open by the member while the door sclosed and adapted to closesijmnltaneously with the opening of thedooiy a mechanism foropeningand closing'the door including 'an-eiectric motor, a circuit: for the motor in which the said switch is included, and means for closing the tor circuitfor starting the motor to move the idoorsullieiently to permit the first-mentioned switch to closeand maintain the motor circuitjcompleted,v 55 The-"combination of asliding door, a.

Switch carried thereby and'arranged to be hen'the door is e19: d, afiexible I coiiductor'iconnected with the switch and l concealed within the door, a moto'1 *'.1controlled by the switch, means driven by -'the motor for actuating the door, and a switch for, connectm, the motor in circuit prior to the closingof the first-mentioned switch.

4. The combination of a door .mounted for sliding movement, a' normally open switch carried thereby and adapted to close automatically with the opening of the door, a

flexible conductor connected with the switch vand having one portion fined and another sportion carried by the door, a takeup devlce acting on the conductor between the fixed portion thereot and the part connected with the door, a motor for opening and closing the door and controlled by the switch, and a second sw tch arranged to connect the motor in circuit prior to the closing of the firstmentioned switch. v L e The comb nat on or a door, a hinged member thereon and disposed vertically along the free edge thereof, means arranged to throw the member outwardly when the door is opened, switches arranged on the door and disposed between the member and electrically actuated means for opening and closmg the door connected in circuit by the sand switches, and a switch for. connecting door to he opened and closed by the member,

said lastmentioned means in circuit togiye .t-he" door the necessary movement to permit the members to close the first-mentloned switches.

6. The combination of a pair of door sections movable simultaneously, a rotatable element ha ving oppositely-disposed. grooves, 'members'on the door sections engaging in the grooves, a motor, a gearing between'the motor and element, a clutch device for throwing in the gearing to rotate the element in either-direction, a platform, a pairof.

levers both cngaging the clutch to shift the" same, and separate means under theplatform for shitting the levers when the platform is depressed, switches under the parts of the platform arranged to be closed by the' FRANK Witnesses:

FRANK H. Harrison, W. T BELL.

scorer. f 

